Is there a mod that resets resources?

I have seven nieces and nephews, and there are like four switches at their house, so I want to try and get them into Valheim. My plan is to build a series of bases(in creative mode), one for each biome. I'd build up to the appropriate level of technological development, so that if they don't want to build bases of their own, they could still use mine, with untapped resources/enemy spawns/etc nearby for maximum adventure potential.

Is there a mod that resets things like sunken crypts, copper veins, etc? (Ideally one that leaves anything inside the anti-spawn radius untouched) Because if so, then I wouldn't have to do it in creative mode.

Edit: Also, specifically, one that only needs to be installed on the dedicated server I'm going to set up\*